From: Dan Williams <dan.j.williams@intel.com>
To: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>, Tejun Heo <tj@kernel.org>,
linux-block@vger.kernel.org, Omar Sandoval <osandov@osandov.com>,
Arthur Marsh <arthur.marsh@internode.on.net>,
linux-scsi <linux-scsi@vger.kernel.org>
Subject: Re: [PATCH 4/4] Revert "scsi, block: fix duplicate bdi name registration crashes"
Date: Wed, 8 Mar 2017 09:12:24 -0800 [thread overview]
Message-ID: <CAPcyv4hbn77kDaDyzP0Nutfh_S-6Hv5bUphnndEgATb_-UsbAA@mail.gmail.com> (raw)
In-Reply-To: <20170308164834.14302-5-jack@suse.cz>
On Wed, Mar 8, 2017 at 8:48 AM, Jan Kara <jack@suse.cz> wrote:
> This reverts commit 0dba1314d4f81115dce711292ec7981d17231064. It causes
> leaking of device numbers for SCSI when SCSI registers multiple gendisks
> for one request_queue in succession. It can be easily reproduced using
> Omar's script [1] on kernel with CONFIG_DEBUG_TEST_DRIVER_REMOVE.
> Furthermore the protection provided by this commit is not needed anymore
> as the problem it was fixing got also fixed by commit 165a5e22fafb
> "block: Move bdi_unregister() to del_gendisk()".
>
> [1]: http://marc.info/?l=linux-block&m=148554717109098&w=2
>
> Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Dan Williams <dan.j.williams@intel.com>
next prev parent reply other threads:[~2017-03-08 17:12 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-08 16:48 [PATCH 0/4] block: Fixes for bdi handling Jan Kara
2017-03-08 16:48 ` [PATCH 1/4] block: Allow bdi re-registration Jan Kara
2017-03-08 22:55 ` Tejun Heo
2017-03-08 23:17 ` James Bottomley
2017-03-09 9:10 ` Jan Kara
2017-03-08 16:48 ` [PATCH 2/4] bdi: Fix use-after-free in wb_congested_put() Jan Kara
2017-03-08 22:56 ` Tejun Heo
2017-03-08 16:48 ` [PATCH 3/4] block: Make del_gendisk() safer for disks without queues Jan Kara
2017-03-08 22:57 ` Tejun Heo
2017-03-08 16:48 ` [PATCH 4/4] Revert "scsi, block: fix duplicate bdi name registration crashes" Jan Kara
2017-03-08 17:12 ` Dan Williams [this message]
2017-03-08 16:50 ` [PATCH 0/4] block: Fixes for bdi handling Omar Sandoval
2017-03-08 17:39 ` Omar Sandoval
2017-03-08 16:55 ` Jens Axboe
2017-03-09 9:05 ` Arthur Marsh
2017-03-09 10:16 [PATCH 0/4 v2] " Jan Kara
2017-03-09 10:16 ` [PATCH 4/4] Revert "scsi, block: fix duplicate bdi name registration crashes" Jan Kara
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